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Message: <blockquote data-quote="oldskool745" data-source="post: 382500" data-attributes="member: 16519">HMMMMMMMM.............Nikasil issue was a problem, but most engines suffering from it will well be showing signs of it by now, it doesnt tend to show up suddenly on engines the age most are now...........3 litre V8 can be a problem, p/s problem would usualy be down to pipes from unit, not unit it self unless seals are pukkaroo'd.The 3 litre tends to have more issues with rocker & head gaskets than 4 litre, rough idle can be due to oil weap from rocker covers getting into sparkplug & spark unit.All V8's can suffer from pcv ( ? ) valve degridation, leads to rough running & poor idle, also crank sensor's tend to be a common problem. My last 3 litre pack a sad due to afm giving up the ghost, easily sorted.Sticky valve not unheard of  but rare.............Good luck with getting it sorted, nice cars & lovely engines when well maintained but they dont tollerate lack of upkeep.Cheers</blockquote>